Hoisting device.



J. M. HOWARD. HOISTING DEVICE.

APPLIOATION FILED 13120.30, 1909.

Patented Aug. 13, 1912.

2 SHEETS-SHEET 1.

J. M. HOWARD.

HOISTING DEVICE.

APPLICATION FILED DBO. so, 1909.

Patented Aug. 13, 1912.

2 BHEETSSHEET 2.

, UNITED STATES PATENT OFFICE.

JOHN M. HOWARD, OF WALLINGFORD, PENNSYLVANIA.

HOISTING- DEVICE- Speciflcatlon of Letters Patent.

Patented Aug. 13, 1912.

Application filed December 30, 1909. Serial No. 535,686.

To all whom it may concern:

Be it known that I, JOHN M. HOWARD, a citizen of the United States, residing at W'allingford, in the county of Delaware and State of Pennsylvania, have invented a new and useful Hoisting Device, of which the following is a specification;

My invention relates to improvements in hoisting devices. n

The object is to provide improved means for communicating power to actuate the hoisting drum and improved means for braking or controlling the movement of the drum.

One of my objects is to so relate the driving pinion, the idlers and the drum that there will be no slip between cooperating parts. a Y

vThis invention is an improvement over the invention described in U. S. patent to a me No. 648,410, May 1st, 1900. Referring i ing shaft.

, or ring carrying the hoisting rope or cable.

to Figure 8 of that patent, it will be noted that the friction wheels E and rollers F are supported on shafts capable of translative movement on horizontal bearing boxes. These horizontal bearing boxes prevented to a large extent, the efficient wedging action of the idlers between the drum and. pinion. In my present invention by mounting the idlers on swinging supports I can so proportion the idlers with respect to the drum and pulley, and so locate the fixed support of each idler supporting means as to get the necessary pinch between the idlers and the pulley to secure a maximum and balanced efliciency.

.My invention also comprises improvements in details of construction.

, Referring to the drawings :Fig. 1 is a front: elevation of my improved hoisting in section. Fig. 3 is a detail in elevation.

Fig.4 isfasectional View showing an alternatev form of drum. Fig. 5 is a detail of a modified construction showing means for lateral adjustmentof the bracket support- [Si ilar numerals refer to similar parts throughout the several views.

Referring to Fig. 1, 5 indlcates the drum Shaftfi is the,mainidrivingshaft, driven from any suitable source of power. Driving pinion 7 is mounted on shaft 6. Against this pinion engage the two idlers 8 and 9. Th'eseyidlers Sand 9 are supported shaft 10 is supported by the swin ing arms 12 while shaft 11 is supported on t e swing ing arms 13. Said arms in turn are supported at their upper ends by the rod or shaft 14, secured in the stationary framework 15. This shaft 14 is preferably provided with means for vertical adjustment, relatively to said supporting structure 15. For example, as shown in Fig. 3, the shaft is vertically movable in the openings 16, and the movement is secured by means of the screws 17.

Upon the idlers 8 and 9 rests the drum or ring 5. The pressure of the drum upon the idlers 8 and the consequent pressure against the pinion or driver 7 is relative to the load on the drum. The position of the shaft 14 controls the efliciency of contact between the idlers 8 and 9 and the pinion 7. That is to' say, when the shaft 14 1s elevated the idlers rest against the pinion 7 above the horizontal plane of its axis. As the shaft is lowered and the point of contact of the idlers approaches and passes below the plane of said axis of the pinion, the pinch or efliciency of contact between the idlers and the pinion is increased. Thus the prevention of slip between pinion and idlers is amply secured by the adjustment of the shaft 14. It will be understood that the entire weight of the drum is carried by the idlers 8, and as these are supported by the brackets 12 and 13 which freely swing on shaft 14, practically the entire weight of the drum is com-' municated through idlers 8 and 9 to the pinion 7 As the axes of the idlers approach to a position horizontal with or slightly below the axis of the pinion, it will be seen that the tendency is for the drum to vwedge the idlers against the pinion with a'very high efficiency of contact. If it is found that there is a slip between the idlers and the drum, then the shaft 14 may be elevated. It will thus beseen that the efficiency of contact between the idlers and the drum and the idlers and the pinion may be so balanced as to secure the parts against any slip ingt As an emergency control for bra ing or stopping the movement of the drum in either direction, either when the hoisting device has made the complete movement in one direction or the other, or in case of too great speed of movement, I provide the followin mechanism. The skid 18 is provided witii theelongated horizontal opening 19 and is shaft loosely supported on the shaft'14, said Skid passing through said opening 19.

'member 18 has its two extensions 20 and 21 and backwardly in directions approximately that of the interior periphery of the drum. Said skid member 18- 1s. also provided with the centrally located lugs 22 adapted to embrace the lever 23. This bent upwardly 7 lever 23 projects downwardly on the outside 7 ing thus actuated in speed of movement of the car. .The skid bethe direction of movement of the idlers will be crammed between the periphery of one idler and the inner periphery of the drum thereby effectually braking and stopping the movement of the drum.

' engage I also provide an automatically operating brake actuated simultaneously with throwing the current into the motor or cutting-it out. The brake-shoes 24 and 25 are sup orted on the arms 26 and 27 respective y pivotally supported at 28. These shoes are provided with seats or projections 29 and 30 respectively, which are adapted to rest on the bifurcated lever 31. This lever 31 is pivotally supported at.32 and is connected at its other or free end by pivot 33, with a connecting arm which is normally pulled downwardly by the spring 35. The solenoid 36 has a movable core 37, to the outer end of which,.at 38, is pivoted one end of the bell lever 39 having its fulcrum at 40. Said. lever pivoted at the other end at 41 to the connecting arm 34. When the spring 35 operates normally to pull the connectingarm 32 andtthe free end of lever 31 downwardly, the brake-shoes are lifted to with the idlers 8 and 9, which not only tends to prevent the rotation of the idlers, but also tends to lift the idlers slightly away from the pinion ,7 which doubly assures the stopping of the actuation of said idlers 8 and 9. When however the current is thrown into the motor to cause the rotation of shaft 6, the solenoid is simultaneously energized to pull the core inwardly. or to the right as shown in Fig. 2, which causes the actuation, through the bell lever 39, of the connecting rod 34 to move the same upwardly, which results in thedepression of the lever 31 to the right of pivot support 32 and the consequent release of the brakes.

The periphery of the drum or ring is preferably corrugated, which serves to increase its strength and at the same time add to the efliciency of engagement of the ropes by some governingmechamsm, operating u-pon predetermined the drum on the idlers,

or cables. I prefer to make this drum or ring of corrugated sheet metal such as shown for example in Fig. 4, where the corrugation extends to the inner periphery of the ring, in which case the peripheries of the idlers 8 and 9 and of the pinion 'Z are correspondingly corrugated for cooperative engagement with each other and the drum. By forming the drum as shown in Fig. 4, a very strong and stable structure is made, which at the same time is light in weight, using a minimum quantity of metal.

Operation: In operating the device, the shaft 6 is rotated by a motor, or from any other suitable source of power, in the desired direction. The "idlers 8 and 9 being pressed, by the weight of the ring or drum 5 resting thereon, against the pinion 7 are caused to rotate in the direction opposite to the pinion, and in turn communlcate, through their contact with the inner periphery of the drum, movement to the drum in the direction of he pinion. The idlers are so placed that they engage with the drum at points very close to the engagement of the rope or cable with the drum, that is, at the point where power or work is exerted on said drum. The idlers 8 and 9, being supported on brackets swinging from shaft 14, have a tendency to swing downwardly in the arc of a circle of which the shaft 14 is the, center; The point of engagement between the drum and the idler is approximately in line with the direction of this movement of the idler, or the movement which the idler would have, were it not counteracted by the pinion 7. The position of shaft 14, and consequently the position of axes 10 and 11 rela* tively to axis 6, affect the power exerted by tocrowd said idlers past the pinion 7 which tendency is very similar to that of the wedge, and hence it is possible to secure any desired relative efiiciency of contact between the pinion and the idlers 8 and 9.

In Fig. -5, I show the shaft 14 supported in a rocking frame 43 pivoted to the stationary framework at 44. The stationary frame 44 is also provided with the are shaped slot'45 through which projects the bolt 46 from the rocking frame, cooperating with the nut 47, for securing said rocking frame in any desired position of adjustment. This structure is desirable where the stationary frame is either mounted on, or suspended from, an inclined surface, or where the ropes or cables are designed to extend from the drum in a direction other than vertically. 1

Other electrically operated means for operating the brake mechanism may obviously be used in place of a solenoid and core.

What I claim is 1. In a hoisting device, the combination of a drum or hoisting ring, a pair of idlers supporting the same, a pinion interposed between the idlers, swinging supports for the idlers having a common axis. 7

2. In a hoisting device, the combination 5 of a drum, interiorly disposed pulleys engaging therewith, swinging supports for said pulleys suppoitedwithin the periphery of the drum and a pinion operating between said pulleys.

3. In a hoisting device, the combination of a drum, interiorly disposed pulleys engaging therewith, adjustably supported swinging supports for said pulleys and a pinion operating between said pulleys.

4. In a hoisting device, the combination of a drum, interiorly located supporting idlers, swinging supports for said idlers, a drivin pinion cooperating with the idlers, an means for changing the angle between the radius of the idler to point of contact with drum, and the radius to point of contact with pinion, to secure the required relative or balanced 'frictional engagement betweenpinion and idlers and between idlers and drum. 7

5. The combination of a hoisting drum, supporting pulleys therefor and a driving pinion cooperating with the pulleys, a swinging bracket for supporting one of said pulleys, said bracket having an adjustable point of support:

6, The combination of a hoisting drum, supporting pulleys therefor and a driving pinion cooperating with the pulleys, a swinging bracket for supporting one of said pulleys, said bracket having a vertically adjustable point of su port.

7. The combination of a hoisting drum, supporting pulleys therefor and a driving pinion cooperating with the pulleys, a swinging bracket for supporting one of said .pulleys, said bracket having a laterally adjustable point of support.

8. The combination of a hoisting drum, supporting pulleys therefor and a driving pinion cooperating with the pulleys, a swinging bracket for supporting one of said pulleys, said bracket having a rotatably adjustable point of support.

9. The combination of a hoisting drum, two supporting pulleys therefor interiorly located, swinging brackets for said pulleys having a common supporting shaft located within the periphery of said drum and a driving'pinion operating between said pulle s.

lO. The combination of a hoisting drum, two supporting pulleys therefor interiorly located, swinging brackets for said pulleys having a common supporting shaft adjustably positioned within the periphery of the drum and a driving pinion operating between said pulleys.

11. A hoisting drum, interiorly located supporting pulleys therefor, a driving pinion operating between the pulleys, and. a skid between the pulleys and the inner periphery of the drum and adapted to be moved in the direction of travel of said pulleys to wedge between a pulley and the periphery of the drum."

12. A hoisting drum, interiorly located supporting pulleys therefor, a driving pinion operating. between the pulleys, and a skid loosely mounted between the pulleys and the inner periphery of the drum and adapted to be moved in the direction of travel of said pulleys to wedge between a pulley and the periphery of the drum.

13. A hoisting drum, interiorly located supporting pulleys therefor, a driving pinion operating between the pulleys and a skid located within the periphery of the drum and adapted to be moved in the direction of travel of said pulleys to wedge between a pulley and the periphery of the drum, and means for operating sai skid.

14. Incombination with a drum, 8. pair of ing pulleys therefor, braking mechanism' comprising brake-shoes for the supporting pulleys, a single sprin controlled lever for actuating the brake-s oes, and a solenoid and core for actuating the lever to release the brake.

16. In a hoisting device, the combination of a hoisting drum formed with its inner and outer peripheries corrugated, supporting pulleys therefor, a driving pinion interposed between the pulleys, and swinging supports for the pulleys supported from a common shaft.

17. In a hoisting device, the combination of a hoisting. drum provided on its inner and outer peripheries with corresponding corrugations, supporting pulleys cooperating therewith having corresponding corrugated peripheries, a driving pinion cooperating with the supporting pulleys having a correspondingly corrugated periphery, and swinging supporting arms for the pulleys having a common axis.

18. In a hoisting device, the combination of a drum, interiorly located supporting pulleys, swinging supports for said pulleys,

' and a driving pinion operating between the pulleys, the position of the axis of one of said swinging supports being such that the distance between parallel lines, one passing through said axis and one through the axis of its supported pulley, perpendicular to the line passing through the axis of the two pulleys, shall not be less than the distance said swinging supports being v of the pulley.

- position of the axis of said swinging sup- & 1,035,442

ciency of engagement between drum and pulleys and between pinion and pulleys.

19. In a hoisting device, the combination 20. In a hoisting device, the combination of a drum, interiorly located supporting of a drum, interiorly located supporting pulleys, swinging supports for said pulleys, pulleys, swinging supports for said pulleys and a driving pinion operatingbetween the and a driving 1n1on cooperating with the pulleys, the position of the axis of one of pulleys, axes o the swinging supports losuch that the c'ated so as to offer a minimum resistance distance between parallel lines, one passing to the pressure of the pulleys against the through said axis and one through the axis pinion, and means for adjusting the posiof its supported pulley, perpendicular to tion of the axis of one of said swinging supthe line passing through the axis of the twoports to secure the desired pinch of the pinpulleys, shall not be less than the distance ion between the pulleys. between the axis of the pinion and the axis of the pulley, and means for adjusting the between the axis of the pinion and the axis JOHN M. HOWARD.

Witnesses: V

- HOWARD S. OKIE,

JNO. P. CROASDALE.

port to secure the required balanced eifi- 

